Double-acting dook closes and check



H. G. VOIGHT.

DOUBLE ACTING DOOR CLOSER AND CHECK.

APPLiCAUON FILED AUG.!, 1919.

1,323,338. I Patented Dec. 2,1919.

* \IIHIIII IIIL i lllllllllm INVENTO H.. 0. VO/GHT HENRY G. VOIGHT, OF NEW" HAVEN, CONNECTICUT.

DOUBLE-ACTING noon CLOSER AND CHECK.

Specification of Letters Patent.

Application filed August 1, 1919. Serial No. 314,704.

To all whom it may concern:

Be it known that 1, Henry G. VOIGHT, a citizen of the United States of America, residing at New'Haven, Connecticut, have invented new and useful Double-Acting Door Closers and Checks, of which the following is a specification.

My invention relates particularly to a construction intended for use in what are commonly termed floor hinges for double swing doors. v

The main object is to provide a simple, compact and reliable construction which can be adjusted readily so as to vary the closing force as well as the checking resistance for both directions of swing independently of each other.

In the preferred form the construction contemplates the use of two independent closing springs with independent means for adjusting them, and a single checking p1ston with two sets of valves and'two inclependent adjusting devices for controlling the flow of the checking liquid.

Figure 1 is a side view and partial longitudinal section of a construction embodying the improvements of my invention, the section being taken generally on the plane of the line 11 of Fig. 2.

Fig. 2 is a plan view and partial section on the general plane of the line 22 of Fi 1.

Eig. 3 is a vertical section on the plane of the line 33 of Fig. 1.

Fig. 4 is a fragmentary plan view showing the connection between the main shaft and'the closing springs.

The main shaft or spindle 5 is adapted to receive or be connected with the lower edge of the door, as usual in structures of this character. It is supported in any suitable manner in the casing 6 at its lower end and in the cover 7 at the top.

Two closing mechanisms are provided symmetrically disposed on each side of the longitudinal axis of the device. Each has a spring 8 compressed between a lever 9 adjacent the shaft and an abutment 10 at the opposite end. Bearing members such as 11 may be interposed between the ends of the spring and the members 9 and 10 respectively. The lever 9 is pivoted at 12 on a vertical pin or stud and has its opposite end pressed against the stationary stop 13 in the casing. The main shaft or spindle 5 is provided with a rearwardly projecting offset'or cam 14 adapted to press against the outer end of one of the levers 9 when the shaft is turned on its vertical axis in one direction or the other so as to. compress the corresponding spring 8 andthus store up power for returning the shaft to its normal intermediate position when the door is released. The abutment 10 is connected to the lever 15, both being mounted ,to swing on a hori- Zontal axis about the bearing shaft 16.. A screw'l? is adjustable through the cover for tiltingthe lever 15 and'the abutment lever 10 so as to compress the spring 8 more or less in accordance with the closing pressure required for that side of the door. The bearing shaft 16 may be secured to the bot tom of the casing for instance, by means of a bracket 18; The corresponding elements of the opposite closing mechanism are indicated by similar reference numbers with prime marks. By this construction it will be seen that the tension of the two closing.

springs 8 and 8 may be adjusted independ- 'ently of each other so as to afford greater or less power onone side or the other, as required.

A; single checking piston 20 is connected by a rod 21 to the crank arm 22 of the main shaft, and fits in a chamber in what may be' termed the cylinder 23. cured in.the outer casing in any suitable manner and is provided with two passages 24 and 24 leading to the interior of the piston chamber. Each of these passages is provided with an adjusting screw or valve such as 25 and25, wherebythefiow of liquid through the passages may be independently adjusted. In addition to the adjustable valve 25 and 25', each passage is provided with a slide valve such as 26 and 26 supported in the top of the cylinder and intersecting respectively the passages 24 and 24', so that when the parts are in a position of rest, the passages 24 and 24 are both closed. -These valves 24-24 may be arranged in slots in the upper part of the cylinder and the cover plate 27 may be provided to hold them in place. Each of the slide valves is provided with a series of teeth such as 28, forming a rack adjacent the spindle or shaft 5, and the shaft is pro vided with asegment' of a gear 29 which is Patented Deo. 2 1919.

The latter is seadapted to engage one or the other of the racks depending upon the direction of oscil lation of the shaft or spindle 5. The

am is prQVidedWith a suitable bypass and valve such as 30, and the entire casing and cylinder are filled with oil above the level of the passages 24 and 2%.

When the door is opened in either direction, the piston 20 as viewed in the drawing is moved to the left or backward, as it may be termed, and the checking liquid flows past the valve 30 in the piston into the chamber 31. At the same time, the teeth of the segmental gear 29 engage one of th racks on one of the valve stems and opens the corresponding slide valve so as to permit additional liquid to enter the piston chamber. This opening movement of the door of course compresses the spring on the opposite side of the mechanism and thus stores up power which will return the door to its normal central position when the door is released. On the return movement, the valve 30 automatically closes and the liquid in the chamber 31 escapes through the passage past the valve which is closing so that the outlet for the checking liquid is gradually decreased as the door closes and the checking resistance corresponding increases so as to bring the door to rest gradually.

By providing a single checking piston and locating it in the center, a minimum number of parts are required and the device is compact, readily manufactured and assembled. By arranging the mechanism as shown and described, the adjustments may be readily efiected by the use of, an ordinary screwdriver.

I claim 1. In a double acting door check and closer, a main shaft, two separate closing springs, means for independently adjusting the operating tension of said springs respectively, a single checking piston connected to said shaft and two independently adjustable mechanisms for controlling the checking piston to afford the same or different degrees of resistance to opposite closing movements as desired.

2. In a door closer and check, a main shaft having a cam extension, two separate closing devices adapted to be operated by i said cam, independent means for adjusting the initial power of said closing devices, a checking piston connected to said shaft, a stationary cylinder for said piston having two escape passages, means for independently adjusting the flow of a liquid through said passages and two independently operable valves adapted to be connected respectively with said shaft for opening and closing said passages.

3. In a device of the character described, a main shaft, two independently adjustable closing devices adapted to be operated thereby, a stationary cylinder, a single checking piston operable in said cylinder and connected to said shaft and two independent slide valves adapted to be operated by said shaft and controlling the escape of fluid from said cylinder.

4.. In a double acting door check and closer, a casing, a vertical shaft mounted in one end thereof, a closing spring on each side of the center of said casing, two independently adjustable means for adjusting the aressure of each of said springs respectiv ly, a centrally disposed checking piston connected to said shaft and two independently adjustable means for controlling the escape of checking liquid to afford the same or different degrees of resistance to opposite closing movements as desired. 7

5. In a device of the char-actor described, a casing, a shaft mounted in one end thereof, a spring on each side of said casing, a pivoted lever interposed between each spring and said shaft, an adjusting lever in the op posite end of said casing for each spring, means for independently adjusting said levers, checking means connected with said shaft and two separate means for independently adjusting the escape of checking liquid.

6. In a device of the character described, a casing, a main shaft pivoted therein, two separate closing devices on opposite sides of said shaft, independent means for adjusting said closing devices, a stationary cylinder, a centrally disposed checking piston in said cylinder connected to said shaft, said cylinder having two escape passages, two independent means for adjusting the size of said passages respectively and independently operable valves controlled by said shaft for opening and closing said passages.

7. In a device of the character described, a main shaft, two independently adjustable closing devices, checking means including a cylinder having two escape passages, independently adjustable means for varying the size of said passages and a slide valve for each passage adapted to be operated by said shaft.

8. In a device of the character described, a casing, a main shaft pivoted therein, closing devices on opposite sides of said casing, a stationary cylinder mounted in the casing between said closing devices, a centrally disposed checking device including a piston operating in said cylinder and connected to said shaft, escape passages in the upper part of said cylinder connecting with the piston chamber, means for independently adjusting the flow of liquid through said passages and slide valves in the upper part of said cylinder adapted to be operated by said shaft.

9. In a device of the character described, a casing, a vertical main shaft pivoted therein, closing devices on opposite sides of said. shaft, a checking device including a piston connected to said shaft and liquid escape passages, independently adjustable means for controlling the flow of liquid.

through said passages and two slide valves ooacting with said passages, said slide valves being located on opposite sides of the casing and having toothed portions extending adjacent said shaft, said shaft having a toothed portion adapted to co-act with one or the other of said lide valves.

10. In a device of the character described, a casing, a main shaft pivoted at one end thereof, a closing device on each side of the casing and co-acting with said shaft, means for independently adjusting said closing devices, said means including screws accessible through the top of the casing, a centrally disposed checking piston connected to said shaft, a'cylinder for said piston, said cylinder having passages extending from the piston chamber into said casing, adjusting screws accessible through the top of the casing for controlling the flow of liquid through said passages and two separate valves co-acting with said passages and adapted to be operated by said shaft.

11. In a door closer, a casing, a main shaft pivoted in one end of the casing, a closing spring in each side of the'casing, an operating lever interposed between each spring and said shaft, and two levers pivoted in the opposite end of said casing, one of said levers co-acting with each of said springs, and means accessible from the top of the casing for independently adjusting said levers and springs.

12. In a door closer and check, the 00111-- bination of a casing, a main shaft mounted therein, a spring in each side of the casing operatively connected with said shaft, two independently adjustable levers in the opposite end of said'casing, each lever co-acting with one of said springs, means operable from the top of said casing for independently adjusting said levers, a stationary cylinder, a checking piston operable therein and connected to said shaft, and two independently adjustable means for controlling the checking action of said piston.

HENRY G. VOIGHT. 

